Means for supplying fuel to internal-combustion engines.



I A H. PAPE.

MEANS FOR SUPPLYING FUEL T0 INTERNAL COMBUS TION ENGINES. APPLICATIONFILED 05;.17. I917.

Patented M- 2 I2, 1918.

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. suppliedto the engine.

AUGUST H. PAPE, OF KENTFIELD, CA LII OBNIA.Y

I MEANS FO B SUPPLYING EUELTO INTERNAL-COMBUSTION ENGINES.

Specification 01 Letters Patent. Patented Mar. 12, 1918.

Application filed December 17, 1917. Serial No. 207,520.

To all whom it may concern:

Be it known that I, AUGUsT H. Para, a citizen ofthe United States,residing at Kentfield, in the county of Marin and State of California,have invented, new and useful Improvements in Means for Supplying Fuelto Internal-Combustion Engines, of which the following is aspecification.

The present invention relates to improvements in means wherebydistillate or other heav fluid fuel may be supplied instead of gaso cueto internal combustion engines.

Many contrivances are now in use whereby an internal combustion enginemay be first started by gasolene and, when the engine has beensuiliciently heated, the gasolene may be shut ofi' and distillate may beWith all such devices, so far as I am aware, when the engine is stopped,the distillate is left in the float chamber of the earbureter. Thisdistillate must be removed before again starting the engine after it hasbeen stopped for a long time, as in cold weather it is hard to start theengine, even though it is primed with gasolene.

The object of the present invention is to provide means whereby, whenthe engine is stopped, gasolene, instead of distillate, is left in thefloat chamber of the carbureter.

In the accompanying drawing, Figure 1 is a vertical section showing oneform of my invention; Fig. 2 is a similar view showing another formthereof.

Referring to the drawing, 1 indicates'a carbureter, a portion onlyofwhich is here shown, since my invention is applicable to any form ofcarburetor, and 2 indicates a float chamber for supplying fluid fuel tothe carburetor; Inmy invention this chamber 2 is supplied withdistillate through a supply condu1tj3 controlled by a needle valve 4:,the stem 6 ofwhich is attached to a grooved collar 7, which is raised byarms 8 of levers 9, pivoted, as shown at 11, on hangers 12 dependingfrom the top 13 of the float chamber. The other arms of said leverscarry weights 14 which are adapted to be raised by a float 16, when thefloat chamber is supp led with distillate to a sufficient extent, thusdepressing the collar and valve stem and closing the valve. When thefloat descends owing to the fall of the level of the distillate in thefloat chamber, the weights 14 aleo descend and raise the valve, so as topernut distillate to enter the float chamber.

The upper end of the stem 6 extends through a bearing 18 in the cover13' of the float chamber, held down. by a spring 20, said stem beingadapted to be depressed by an arm 21 of a three-armed lever ivoted, asshown at 23, upon a standar 24 erected upon the rim of the floatchamber,

- another arm 26 of-which is attached at its outer end toone end of aheavy spring 27, the other end of which is attached to 'awire or cord 28leading to a point convenient for opcrationf One end of a light-spring29' is also attached to 26, the other end being stationarilysecured.When there is no tension upon'the cord 28, the spring 29 raises said arm21 and permits said valve fl to be raised by the fall of the level ofthe liquid in the carbureter', so that, unless the cord or wire28 isunder tension,

the float chamber will operate in the ordinary manner and permitdistillate to enter the float chamber and carbureter, but,-if the cord28 be pulled so as to put the heavy spring 27 under tension, then thevalves: will be closed'to prevent further'entrance of distillate intothe float. chamber This will be done while the engine is runnin' andafew minutes before it is expecte to be stopped. \Vhen this happens,another arm 31 of the three-armed lever, which, while the distillate wasentering the float chamber ".2, was depressing/a similar valve stem 32of afloat chamber 33, andso was holding closed a valve 34 to prevent theadmission of gasolene into the float chamber 33, is raised, therebypermitting the gasolene to enter said float chamber 33 under.v thecontrol of a float 36 in said float chamber, operatingin a man'- nerprecisely similar to the float 16, thereby permitting gasolene also toenter the float chamber 2 by a conduit 37 connecting said chambers 2 and33. 'Therefore, by thetime the engine is stopped, all the distillatewill have flowed out of the float chamber 2 and the outer end of saidarm will have been displaced by gasole'ne, so that the engine is melene.

In the modification of the invention shown in Fig. 2, gasolene enters afloat chamber 35 by trance is controlled by an upwardly closing valve 39attached to a float 41 and the stem 42 of which is guided in a guidewa43. Said valve 39 closes the lower end of a ush: ing 40, screwed, forthe purpose of adjusty to start again on gasof a conduitf38 at the top,and its enmeat, in the lower portion of the oonduit38,v

3'0 draw the liquid through the nozzle of the which is threadedthroughout its length. Thus asolene is always ready to enter the float camber 35 when the level of the asolene therein descends below a certainhe] ht. In this case the arm31 and, when distillate flows out of thefloat chamber 2 into the carbureter, its place is automatically suppliedwith gasolene from. thefpatychamber 35, and this again isautomaticallysupplied with gasolene flowing through the inlet conduit38, said flow being contro' led by the valve 39 which is raised to closesaid opening When the level of the asolenein saidchamber arrives to acertain eight, The float 41. operates to close the valve 39 at'aslightly lower level of the gasolene'in" the float chamber 35 than thelevel of the distillatein the float chamber 2. This is necessarybecause, otherwise, if the level of-the gasolene in the chamber 35 werethe same as the' level of the distillate in the chamber'2, there wouldbe a'conti-nual flow otgasolene frornthe chamber 35 into the chamber.2-, itsplace being continuously su lied withgasolene from the asolenetanli, because the ;valve wo uld be slig tly open. w By reason however,of the level of the fluid in the c 'ambejr'35 bein flower than the*workmglevel in the chem er 2,-which is the proper-level for the/suctionrequired to carbureter, the suction-throughjthe nozzle will have-tobeinc'reased in order to overcome said lower level in the chamber --35andcbnsequently will draw in too much airin: roportion to the gasoleneand result in' too 'ghta mixture. To avoid'thisobjec- .tion I 'se'curearound the valvestem 42, above the float 41, a conical vessel 44havivregl-in its lower portion 'a small hole 45.

, en gasolene is flowing into the chamber 35 from the gasolene'supply,the gasolene runs into the vessel 44 faster than it can escape throu hthe hole 45, and fills said' Vessel and t en overflows 'at the top andfallssinto thetvesel 35, and, consequently,

' raisesthe level of thegasolene in the cha'ma ber35 to the properheight, the float 41 heir: depressed by theextraweight of the gasoeneinthe vessel 44, notwithstanding the higher level of the gasolenein thevessel 35, ;which would otherwise tend to close the is dispensed with,

' heavy and light fluid fuels passage of fluid fuels to has operated. bythe respectivefloatsand valve 39. A short time, however, after the flowof the gasolene from the gasolene supplly tank has stopped, the asolenewill have alrun out 'ofthe vesse? hole 45, lightening they 41 and valve39. v The above construction has the additional advantage that themaintain closed thevalve 39 is increased, this pressure being due tothebuoyancy of the liquid which, as explained above, is at a higherlevel than would otherwise be the case.

- I claim:

'L'The combination of acarbureter, a

44 through the weight of the float permitting said float to close thepressurertending to Y plying light fluid fuel to the first-named floatchamber, valves for respectively closmg the passage of 'fluid fuels tothe said float chambers operated by the respective floats, and anopen-topped vessel having a .small escape aperture therein and carriedby said second-named float and arranged to receive thelight fluid fuelentering said sec- .ond-named chamber.

3. The combination of a carbureter, a float chamber, a float therein forsupplying heavy fluid fuel to the carburetor, an auxilia'ry floatchamber, a float therein for supchamber, valves for respectively closingthe means whereby, when sald second valve is openrl to admit light fluidfuel, the weight tending to open said valve is increased.

AUGUST H. .PAPE.

the said float cham- I

